Castello... and other makers, have made some interesting variations on the standard bulldog. If you go to Google, select images, and type in "Castello bulldog", you'll see some cool pipes... and cute dogs too!
I have 2 Castello bulldogs. One is a straight with a military bit from 1963 and the other is a somewhat large bent with a saddle bit. Both are black searocks. When I was in the pipe biz I sold quite a few others, they were very popular and went fast.